Why String Theory Is Not Science (forbes.com)

StartsWithABang writes: Earlier this month, a conference was held devoted to the question of whether untestable scientific ideas like string theory and the multiverse are actually science or not. While many opinions were stated and no one changed their mind, the answer is apparent: unless you're willing to change the definition of science to include "this thing that isn't science," then no, string theory is not science. It's a theory in the sense of a mathematical theory — like set theory, group theory or number theory — but it isn't yet a scientific theory. Of course, it could become science, but that would require that it actually do the things a scientific theory does: make testable predictions that can be validated or falsified.

Comments

Only if you Exclude Technological Limits

[Roger W Moore]

The condition for science is that it has to be testable in principle, NOT that it has to be testable within the limits of current technology. When Higgs came up with his theory there was no accelerator capable of testing it (although we did not know that at the time). So would that make the Higgs mechanism non-science until the 21st century when we built the LHC? Clearly not. So, unless String theory is completely untestable in principle, regardless of potential future technological advances, it is science albeit science which is currently impossible to test with current technology.

Re:Only if you Exclude Technological Limits

[hey!]

The classic example used by logical positivists in the early 20th century was any conjecture about the far side of the Moon. Until we developed spacecraft any statement about the half of the Moon we can't see would have been untestable in practical terms, but it would have been testable in principle.

Re: Climatology

[Anonymous Coward]

Didn't take long for the peanut gallery to weigh in.

Re:Climatology

[phantomfive]

No. Climatology, even if you are the biggest skeptic, makes testable predictions all the time. For example, predictions that the earth will be two degrees warmer in 100 years. That is completely testable: it will take 100 years to test it, but that's irrelevant.

An untestable theory is one that can never be tested, even with infinite time and resources. For example, "the universe was created as-is five minutes ago." Maybe that's true, but there's no way to test it. Even if you had a time machine, it still couldn't be tested. There is no experiment that can be imagined to test this.

In the case of string theory, the author claims that string theory makes no predictions that distinguish it from the standard model. That is, if you perform an experiment, you will not know if it is supporting string theory, or if it's just a natural result of the standard model.